ABSTRACT
O Note: Insecticidal formulations usually contain the two stereoisomers α-and β-endosulfan in an approximate ratio of 70:30 (Goebel, 1983). CASRN: 33213-65-9; DOT: 2761; DOT label: Poison; molecular formula: C9H6Cl6O3S; FW: 406.92; RTECS: RB9275000; Merck Index: 12, 3614 (mixed isomers) Physical state, color, and odor: Colorless to brown, nonflammable solid or crystals with a mild odor similar to terpene or sulfur dioxide. Melting point (°C): 207-209 (Ali, 1978) Density (g/cm3): 1.745 at 20/20 °C (Sax, 1984) Diffusivity in water (x 10-5 cm2/sec): 0.45 at 20 °C using method of Hayduk and Laudie (1974) Henry’s law constant (x 10-5 atm⋅m3/mol): At 20 °C: 0.87 and 2.09 in distilled water and 33.3‰ NaCl, respectively. Technical endosulfan
[α-endosulfan (70%) + β-endosulfan (30%)]: 6.38 and 13.07 in distilled water and 33.3‰ NaCl, respectively (Rice et al., 1997, 1997a).
